attempt to build fails

[Domjen2521]

i follow the steps and get to npm install pm2@latest -g.
I get the following error message.

-bash: npm: command not found

i was able to use github to download the code i had to do the clone using the https since this os doesnt want to recognize the gh command. i am using the raspiOS lite and the raspiOS full with desktop and both give me the same error message.